@article{MABA_2001_15_1-2_a6,
     author = {M. G. Karatopraklieva},
     title = {On a {Nonlocal} {Boundary} {Value} {Problem} {For} an {Equation} of {Mixed} {Type} with {Discontinuous} {Coefficients}},
     journal = {Mathematica balkanica},
     pages = {67},
     publisher = {mathdoc},
     volume = {15},
     number = {1-2},
     year = {2001},
     url = {http://geodesic.mathdoc.fr/item/MABA_2001_15_1-2_a6/}
}